Optionally allow empty junit test results

Change-Id: Ic0f8f939e32bdbc2bf264e0386cb97489877aacb
diff --git a/jjb/verify/chameleon.yaml b/jjb/verify/chameleon.yaml
index 63cfbc9..02bb32c 100644
--- a/jjb/verify/chameleon.yaml
+++ b/jjb/verify/chameleon.yaml
@@ -8,6 +8,7 @@
     jobs:
       - 'verify-chameleon-jobs':
           branch-regexp: '{supported-branches-regexp}'
+          junit-allow-empty-results: true
       - 'publish-chameleon-jobs'
 
 - job-group: